On Thu, 25 May 2017 13:36:42 +1000
Balbir Singh [off-list ref] wrote:

Enable STRICT_KERNEL_RWX for PPC64/BOOK3S

These patches enable RX mappings of kernel text.
rodata is mapped RX as well as a trade-off, there
are more details in the patch description

As a prerequisite for R/O text, patch_instruction
is moved over to using a separate mapping that
allows write to kernel text. xmon/ftrace/kprobes
have been moved over to work with patch_instruction

I think optprobes needs to be moved over as well.
I did not realize we have the optprobe_trampoline in
text (yikes!!)

There are a few bug fixes, the updatepp and updateboltedpp
did not use flags as described in PAPR and the ptdump
utility ignored the first PFN

Radix support is going to be incrementally added. I would
request a review of whats there. May be the bug fixes for
lpar.c and dump hash page tables can go in indepedently
along with the basic cleanup of kprobes.

Balbir Singh.